I'm not going to get into the actual numbers I suspect, but I feel a significant portion of the reviews are either inaccurate or flat out lies that never even happened. I think some people do this because they have some very serious ego/pride issues that are unresolved, and this is an outlet for them. So they post an encounter that never even took place, then send the link to their numerous male friends and brag about how they got it on with an amazingly beautiful chick. Then, if their friends happen to congratulate them, they feel "better" inside. I'm sure the same thing happens with all of these people who write stories to certain magazines.
Nice thing is that it's probably easier to identify the honest reviews.